掺铒β-Ga2O3：掺杂诱导的结构、磁性和光学性质改变

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-30 DOI:10.1016/j.jmmm.2025.173113

Anju Babu, N. Madhusudhana Rao

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引用次数: 0

摘要

本研究分析了水热法合成的掺铒浓度为0、1、3和5 M%的β-Ga2O3粉末样品的掺杂诱导的结构、磁性和光学性质的改性。x射线衍射分析证实，在所有含有少量Er3GaO6相的样品中，存在单相单斜β-Ga2O3，特别是在掺铒为5 M%的样品中。x射线光电子能谱（XPS）分析证实了制备样品中Ga、O和Er的存在，Ga和Er呈现+3氧化态。扫描电镜（SEM）分析显示了样品的表面形貌。能量色散x射线光谱（EDX）分析证实了掺杂样品中镓、氧和铒的存在。紫外可见吸光度研究和Tauc图分析表明，掺杂降低了吸光度和带隙。电子顺磁共振（EPR）谱显示了与单电离氧空位相关的顺磁中心的存在。紫外-可见区的光致发光研究（PL）发现β-Ga2O3和铒离子的特征发射峰。荧光寿命分析表明，荧光寿命随Er浓度的增加而增加。室温下的磁测量表明，掺铒后纯β-Ga2O3由抗磁性变为顺磁性。

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Erbium-doped β-Ga2O3: Insights into doping-induced structural, magnetic, and optical property modifications

This study analyzes the doping-induced structural, magnetic, and optical property modification of β-Ga₂O₃ powder samples doped with erbium ions at 0, 1, 3, and 5 M%, synthesized via a hydrothermal method. X-ray diffraction analysis verified the presence of a single-phase monoclinic β-Ga₂O₃ across all the samples with a minor Er₃GaO₆ phase, exceptionally in samples doped with Er at 5 M%. X-ray photoelectron spectroscopy (XPS) analysis confirmed the presence of Ga, O, and Er in the prepared samples, with Ga and Er exhibiting a +3 oxidation state. Scanning electron microscopy (SEM) analysis revealed the surface morphology of the samples. Energy dispersive X-ray spectroscopy (EDX) analysis verified the presence of gallium, oxygen, and erbium in the doped samples. UV–Vis absorbance studies and Tauc plot analysis indicated a reduction in absorbance and bandgap with doping.. Electron paramagnetic resonance (EPR) spectra indicated the presence of paramagnetic centers related to singly ionized oxygen vacancies. Photoluminescence studies (PL) in the UV–Vis region revealed characteristic emission peaks of β-Ga₂O₃ and erbium ions. Fluorescence lifetime analysis showed an increase in fluorescence lifetime with increasing Er concentration. Magnetic measurements at room temperature demonstrated a change in pure β-Ga₂O₃ from a diamagnetic to a paramagnetic state upon erbium doping.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.